Small Numbers of Vortices in Anisotropic Traps

Details Small Numbers of Vortices in Anisotropic Traps Small Numbers of Vortices in Anisotropic Traps

2009-02-24

arxiv.org/abs/0902.4205v1

Phys. Rev. A 79, 053616 (2009)

Physics

Condensed Matter

Other Condensed Matter

7 pages, 7 figures

Scientific paper

10.1103/PhysRevA.79.053616

We investigate the appearance of vortices and vortex lattices in two-dimensional, anisotropic and rotating Bose-Einstein condensates. Once the anisotropy reaches a critical value, the positions of the vortex cores in the ground state are no longer given by an Abrikosov lattice geometry, but by a linear arrangement. Using a variational approach, we determine the critical stirring frequency for a single vortex as well as the equilibrium positions of a small number of vortices.

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